山药新品种紫莳药9号的选育

A New Yam Variety—‘Zishiyao No.9’

紫莳药9号是由浙江省台州市传统紫山药品种紫莳药变异株经系统选育而成的紫山药新品种。中晚熟,生育期180 d(天)左右,植株生长势中等,分枝数3~6个,单株结薯数1~2个,无零余子;块茎圆柱形,须根少,长30 cm左右,直径10 cm左右,质量1.2 kg左右,表皮褐色,肉紫色,肉质较粉、稍带糯,干物质含量269.0 g·kg^(-1),淀粉含量202.0 g·kg^(-1),可溶性糖含量18.0 g·kg^(-1);田间对炭疽病的抗性强于对照紫莳药,一般产量1500~1750 kg·(667 m^(2))^(-1),高产可达2000 kg·(667 m^(2))-1,适宜浙江台州地区种植。

‘Zishiyao No.9’is a new purple yam variety bred through systematic selection and breeding from a traditional Taizhou City purple yam variety‘Zishiyao’.It is of mid-late maturity.Its growing period is about 180 days.The plant has medium growth vigor.It has 3-6 branches.The single plant rhizome number is 1-2 without bulbils.The rhizome is of cylindrical shape with few fibrous roots.They are about 30 cm in length,about 10 cm in diameter,and about 1.2 kg in weight.Its peel is brown in color,pulp is purple in color,and flesh is rather powdered and little glutinous.Its dry matter content is 269.0 g·kg^(-1),starch content is 202.0 g·kg^(-1),soluble sugar content is 18.0 g·kg^(-1).In fields,its resistance to anthracnose is stronger than that of the contrast‘Zishiyao’.Generally it can yield 22.50-26.25 t·hm^(-2),and the highest yield can reach 30 t·hm^(-2).It is suitable to be planted in Taizhou region,Zhejiang Province.